Which of the following suffix is always correct for taxonomic categories without any exception?

Options

A. "-ia" for class like in class Mammalia
B. "-ca" for genus like in genus Musca
C. "-ceae" for family like is family Poaceae
D. "-oda" for phylum like in phylum Arthopoda

Answer

To solve the question regarding which suffix is always correct for taxonomic categories without any exception, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for a suffix that is consistently used for a specific taxonomic category in biology. Taxonomic categories include kingdom, phylum, class, order, family, genus, and species.

2. **Define Suffix**: A suffix is a letter or a group of letters added at the end of a word to form a new word or to change the meaning of the original word.

3. **Analyze Each Option**:
- **Option A (IA for Class)**: While some classes use the suffix "IA" (like Mammalia), not all classes do. Therefore, this option is not universally applicable.
- **Option B (CA for Genus)**: The suffix "CA" is not consistently used for all genera. Different genera may have different suffixes, so this option is also incorrect.
- **Option C (CEAE for Family)**: This suffix is consistently used for plant families (e.g., Poaceae, Solanaceae). This makes it a strong candidate for the correct answer.
- **Option D (ODEA for Phylum)**: Similar to the previous options, not all phyla use "ODEA" as a suffix (e.g., Mollusca, Arthropoda), making this option incorrect.

4. **Select the Correct Answer**: Based on the analysis, **Option C (CEAE for Family)** is the only suffix that is always correct for the taxonomic category of family without any exceptions.

5. **Conclusion**: The correct answer to the question is **Option C (CEAE)**, as it is consistently used for plant families.